Some q-Supercongruences from Transformation Formulas for Basic Hypergeometric Series

Several new q -supercongruences are obtained using transformation formulas for basic hypergeometric series, together with various techniques such as suitably combining terms, and creative microscoping, a method recently developed by the first author in collaboration with Zudilin. More concretely, the results in this paper include q -analogues of supercongruences (referring to p -adic identities remaining valid for some higher power of p ) established by Long, by Long and Ramakrishna, and several other q -supercongruences. The six basic hypergeometric transformation formulas which are made use of are Watson’s transformation, a quadratic transformation of Rahman, a cubic transformation of Gasper and Rahman, a quartic transformation of Gasper and Rahman, a double series transformation of Ismail, Rahman and Suslov, and a new transformation formula for a nonterminating very-well-poised 12 ϕ 11 series. Also, the nonterminating q -Dixon summation formula is used. A special case of the new 12 ϕ 11 transformation formula is further utilized to obtain a generalization of Rogers’ linearization formula for the continuous q -ultraspherical polynomials.